Rotating Disc Contactor, Liquid Extraction Systems Manufacturer, Exporter
Sieve Plate Extraction Columns, Pulse Columns Manufacturer, Exporter
A Rotary Disc Contactor (RDC) is a type of process column used in the Chemical Process Industry for Liquid- Liquid Extraction, remove impurities from Liquids. It is used widely in the Pilot Plant studies of critical Extraction of Liquid Phase.
The System consists of a vertical cylindrical Column , divided lengthwise into a number of equally spaced compartments by series of stator rings. A rotor disc supported by a shaft is centred in each compartment. The solute is dispersed in droplets due to Agitator Disc. The Mass Transfer occurs between the Droplets and surrounding carrier liquid in continuous phase.
Liquid- Liquid Extraction: – Liquid- Liquid Extraction is an important unit operation for wide range of application in the Chemical Process Industry. Unlike Distillation, which based on Boiling Point differences, extraction is based on their relative solubilities in two immiscible liquids. Extraction is always preferred over Distillation, for separation application which are not possible with Distillation and its Cost- effectiveness.
In Liquid-Liquid Extraction a Liquid (Carrier) containing the components to be separated is passed in an Extraction Column where it contacts a solvent. The two liquids must be immiscible or slightly miscible. A dispersion is formed with one liquid in the form of droplets. The Mass Transfer takes place between the Droplets and solvent in continuous flow. Based on density differences, the two liquids are separated, and are recovered at the top or bottom of the Extraction column.
In Rotary Disc Contactor the separation is based on Counter Current principle, higher density liquid enters from top and lower density liquid enters at bottom. The two liquids pass each other as they move through the compartments, because of density difference. The process of mixing and separating two liquids is reinforced by rotation of the rotor disc. Varying the Column Diameter, Column Length, Compartment Height, Flow Speed and Rotational Speed allows for adjustment of Droplet Size in the Dispersed Phase.
TYPES OF ROTARY DISC CONTRACTOR
Karr Column: The shaft is oscillated in vertical axis along-with the rotational movement i n h orizontal axis.
Scheibel Column: The Shaft has Turbine Impellers and I nner & O uter B affles.
Pulsed Column: A Pulsation is created by passing compressed air along-with Shaft Agitation
Rota ry Disc Contactor with Late ra l Movement: The shaft moves laterally along-with r otational m ovement